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Last summer I test drove two 04 RXs from a dealership. Both had about 80,000KM or 50,000 miles. From the outside I couldn't hear anything but while driving, I could hear a ticking sound. I'm not a mechanic but maybe the lifters or something.
So I ended up purchasing a 04 out of WI with 36,000 miles. What I liked was the fact that it didn't have the ticking noise. Well, now at 40,000 miles, there is a ticking noise from the engine.
I changed the oil and used synthetic thinking it would help.
Is this ticking common?
Should I put something in the gas to help?
Should I bring it into the shop?
I've been told that it's the injectors and not to be concerned. If it's an 04' then it's probably out of warranty. If it's not, I think there's a TRO to fix it. I was also told that they run better if you don't fix it.